RT Journal Article
SR Electronic
T1 Contractile properties of the abductor digiti minimi muscle in paramyotonia congenita
JF Journal of Neurology, Neurosurgery & Psychiatry
JO J Neurol Neurosurg Psychiatry
FD BMJ Publishing Group Ltd
SP 894
OP 899
DO 10.1136/jnnp.37.8.894
VO 37
IS 8
A1 Burke, David
A1 Skuse, Nevell F.
A1 Lethlean, A. Keith
YR 1974
UL http://jnnp.bmj.com/content/37/8/894.abstract
AB In two subjects with paramyotonia congenita the isometric torque generated by the abductor digiti minimi and the surface EMG recorded over ADM decreased during prolonged or repetitive contractions, whether these were voluntarily or electrically induced. Isometric twitch times did not alter significantly during this muscle fatigue. Cooling greatly accelerated the fatiguing process. It is suggested that this local muscle weakness is due to a progressive decrease in excitability of the muscle cell membrane.